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. Author manuscript; available in PMC: 2015 May 13.
Published in final edited form as: Interdiscip Top Gerontol. 2014 May 13;39:45–61. doi: 10.1159/000358899

Fig. 3.

Fig. 3

Microscopic picture of early passage (“young”) fibroblasts (left) and fibroblasts at the end of their replicative potential. (Photos by L. Hayflick, reproduced with permission)